APA (7th ed.) Citation

Simkin, J. Encyclopaedia of British history, 1500-1980. Spartacus Educational.

Chicago Style (17th ed.) Citation

Simkin, John. Encyclopaedia of British History, 1500-1980. [England?]: Spartacus Educational.

MLA (8th ed.) Citation

Simkin, John. Encyclopaedia of British History, 1500-1980. Spartacus Educational.

Warning: These citations may not always be 100% accurate.